Power-transmission device.



J. W. COCKBURN.

POWER TRANSMISSION DEVICE.

APPLICATiON FILED DEC.22.1913.

1 l 5 3,03 1 Patented Sept. 7, 1915.

4 SHEETS-SHEET I.

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J. W. COCKBURN.

POWER TRANSMISSION DEVICE.

APPLICATION FILED DEC. 22. 1913.

1, 1 53,03 1 I Patented Sept. 7, 1915.

4 SHE ETSSHEET 2.

f Invmtnn 11 m, JWCOC/(Bl/KN COLUMBIA PLAiioGn/mrl :0" WASHINGTON, D. c

J. W. COCKBURN.

POWER TRANSMISSION DEVICE.

APPLICATION FILED DEC. 22, I913.

Patented Sept. 7, 1915.

4 SHEETS-SHEET 3- Invenlor.

JJ MCOCKEURN 111mm J. W. COCKBURN.

POWER TRANSMISSION DEVICE.

APPLICATION FILED DEC.-22, 1913.

Patented Sept. 7, 1915.

4 SHEETS-SHEET 4.

m we w mw IJ T0 all-412710912 it may concern i lily invention consistsof able friction wheels adapted to engage the I rena? onmon.

JOHN VTIL SON OOGKBURN, OF DUNDAS, ONTARIO, CANADA.

POWER-TRANSMISSION DEVICE.

Be it known that 1, Joan BURN, of the town of Dundas, in the county oflVentworth, in the Province of Ontario,

Canada, have inventedcertain new and useful Improvements in PowerTransmission Devices, of which the following is the specification. I

My invention relates to l'HTlPI'OVBDIGIltS in power transmission devicesand the object of the invention is to devise a transmisslon device ofthe friction type in which friction wheels are adapted to bear on eachside of the friction disk whereby any side strain on the same isequalized. Y I

A further object is toconstruct a power transmission device which canbereadily reversed.

A still further object is to devise a power 1 transmission device whichcan be operated at varied speeds in either direction. 7

Another object is to devise means for conto which is inter-connectedmeans for reversing the mechanism. A

friction disk on each side of the sameequalizing the strain thereon,longitudinally slidable shafts connected to the friction wheels,

intermeshing gears mounted on said'shafts, rocker brackets, alongitudinal shaft mounted on said rocker brackets, a flanged gear;slidably keyed to said shaft and adapted to mesh with either of theaforesaid gears,

friction disk all as hereinafter more para ticularly described andillustrated in the being secured to the cross bars '2 of theaccompanying drawings in which Figure 1 represents a plan vlew (brokenaway interme'diately) of a device constructfor operating the device inone direction.

Fig. 4; is a' similar view to Fig. 3 showing the flanged gear meshmg-w1th the left hand Specification of Letters Patent.

WILsoN Coon a pair of movmeans for "controlling the shifting of theflanged gear. Fig. 6 is a perspective view of a portion of thesupporting frame for my device showing the locking arrangement for therocker brackets and the means for releasing the same. Fig. 7 is aperspective detail showing the means for-throwing the friction wheelsout of engagement with the friction disk. Fig. 8 is a perspective detailof a portion of the yoke connected to the brackets supporting thefriction wheels.

Like characters of reference indicate cor= responding parts in thedifierent views.

1, 1 are the side barsof the supporting frame.

2,2 are the cross bars thereof.

3 is the friction disk and 4 is theline shaft upon which the frictiondisk is mounted.

5, 5 are the friction wheels.

6, 6 are the longitudinally slidable shafts to which the friction wheelsare connected. I

7 7 are bearings for the shafts '6 mounted 011 one of the cross bars '2and having the lateral slots- 8 therein to permit the bearings Ibearings being pivotally connected at their inner ends to the cross bar2 and having arcshaped slots 10 therein to permit of the same beingswung about the pivot points.

11-is a longitudinal key-"slot inone of the shafts '6 and 12 is a pulleymounted on such shaft and keyed thereto, said shaft being capable ofmoving longitudinally relatively to the said pulley.

13, 13'are filter-meshing gears rigidly con nected to the shafts 6. g

14 1a are rocker br'ackets' swingably mounted on the bearings 15, suchbearings frame.

16 is a longitudinal shaft mounted on the rocker brackets in bearings 17therein.

18 is a gear having flanges 19 adapted to Patented-Sept. '7, 1915.

Application filed December 22, 1913. Serial No. 808,233.

Fig. 5 is a cross-sectional view.

be slidably keyed to the longitudinal shaft 16 by the saddle-key 20.

2'1 and 22 are pulleysrigidlyconnected to the longitudinal shaft 16, theformer the shaft remote being connected between the rocker brackets andthe latterto the end of from the friction disk.

pins 26.

29, 29 are pawls pivotally connected in the cross bars 2 of the frameand adapted to engage the extremities 14 of the rocker brackets 14 whenthey are in the proper position as will'be hereinafter described.

30, 30 are cables connected to the lower extremities of the pawls andextending around pulleys 31 suitably attached to the frame. The cables30 are connected together at the points 32 and the cable 33, passingover rollers 34 and around a roller 35 mounted on a bell crank lever 36suitably pivoted to the lower end of the lever 27, has its ends connected to thecables 30 at the points 32.

37, 37 are U-shaped brackets having hearing portions 38, said bearingportions sun rounding the shafts 6 on each side of the correspondingfriction wheel 5.

39 is'a yoke connected to the brackets 37. The yoke is divided at oneend and one portion has the lateral slot 40. p

41 is a bolt extending through the lateral slot in one portion andscrewing into the other portion. g 1

42'isa link pivotally connected at one end to the yoke 39 by theaforesaid bolt 41 and pivotally connected at the other end to the lever27.

.43 is a quadrant having a longitudinal slot 44 therein, through whichthe lever 27 extends, said quadrant being suitably mounted on the frameand having suitable teeth 45 on one side of such slot. I

46 is a spring pawl secured to the lever and adapted to engage the teethof the quadrant. v

47 is a disk having a depending lever 48, such disk being rotatablymounted in one of the cross bars 2 and having suitably arrangedupwardlyextending pins 49.

50,50 are arms connected to the inner ends of the bearing 7 at one endof each and pivotally connected at their other ends to the disk 47 bythe pins 49.

51, 51 are projections onthe' upper faces of such arms adapted toengagethe longitudinal portions 39 of the yoke 39.

The operation of the device is as follows :Assuming that it is desiredto have the power pulley connected to the shaft 16 and such pulley'to berevolved in a clockwise direction, the flanged gear 18 is thrown overinto mesh with the right hand gear 13 and as it is to be understood thatthe friction disk 3 is run in a counter clock-wise direction the powerpulleyv such as 21 or 22 will be revolved in a clock-wise direction asis shown in Fig. 3. In order to throw the flanged gear over into suchposition as above described the lever 27 is held at the handle and thelower end of the bell crank lever 36 is pressed in against the handlewhich draws the pulley 35 downwardly, consequently pulling on the cable33 and also on the cables 30 to which such cable 33 is connected whichwill cause the pawls 29 to be thrown out of engagement with theextremities 14 of the rocker brackets 14 and thus permit such rockerbrackets to be swung. Then by swinging the lower end of the lever overto the left the rocker brackets and shaft 16 will be thrown over to theright until the flanged gear 18 comes into mesh with the right hand gear13 when upon releasing the bell crank lever 36 the pawls 39 will engagethe extremities 14 of the rocker brackets 14 and thus hold the same inposition.

When it is desired to reverse all that is necessary is to repeat theabove operation and throw the flanged gear 18 over into mesh with theleft hand gear 13 by throwing the lever 27 over to the right instead ofto the left, when the shaft 16 will be revolved in the opposite orreversed direction, as is shown in Fig. 4. Of course it is to beunderstood when it is desired to reverse the shaft 16 it would benecessary to throw the friction wheels 5 out of engagement with thefriction disk prior to making such reversal, and for this purpose thelever 48 and disk 47 are provided. When it is desired to throw thefriction wheels out of engagement with the friction disk the lever 48 isturned in a clock-wise direction which by reason of the arms 50 beingconnected to the bearings 7 pushes these bearings outwardly which throwsthe shafts 6 out of true a small extent thus spreading the frictionwheels 5 and throwing them out of engagement with the friction disk 3.In order, to avoid springing the shaft the bearings 9 are pivotallymounted on.the cross bars 2 so that the bearings will be capable ofswinging a certain extent when such operation takes place. 7 WVhen it isdesired to throw the friction wheels 5 into engagement with the frictiondisk 3 the lever 48 is turned in the opposite direction and the bearings7 drawn inwardly. In order to take the strain off such bearings to acertain extent the projections 51 are provided on the arms 50, suchprojections being adapted to bear against the portions 39 of the yokewhich has a tendency to throw the brackets 37 inwardly at the same time.

I will now describe the means by which I 37 respectively in a forwarddirection, consequently moving the slid-able shafts '6 forwardly and :asthe friction wheels are carried by such shaft this movement of the levermoves the friction wheels nearer to the center of the friction disk '3and consequently a low speed is attained as the friction wheels run at aspeed more nearly equal to the speed of the line shaft'and consequentlythe shaft 1 6 is run slower. To run at a high speed the friction wheels5 and shafts 6 are drawn back by moving the lever in the oppositedirection to that described above. It will be readily seen that thespring pawl 46 will engage the teeth 45 of the quadrant and willconsequently hold the friction wheels in any desired position. Of coursewhere the device is running it will be necessary to throw the frictionwheels out of engagement when it is "desired to change the position ofthe same relatively to the friction disk and consequently the yoke 39 isdivided as has already been described and connected together by the bolt41 extending through the slot 40 which will permit the yoke to be thrownout laterally a certain extent when the wheels 5 are thrown out ofengagement with the disk.

It is to be understood that the device can be operated in eitherdirection with equal facility and that the speed can be varied whetherthe shaft 16 is revolving in the for ward or reverse directions; Furtherthe flanged gear 18 is slidably keyed to the shaft 16 which will permitof its moving longitudinally relatively thereto when the shafts 6 movelongitudinally to vary the speed.

It will be seen upon reference to the drawings that I have shown apulley l2 slidably keyed to one of 'theshafts 6. This provision is madewhere it is desired to operate a machine from such pulley where it isnot de sired to reverse the same but where it is required to operate themachine at varied speeds as for instance in connection with a turretlathe. Also in the drawings Ishow two pulleys mounted on the shaft 16,one between the rocker brackets and the other on one end of the shaft.The former would be used where it is desired to confine the length ofthe transmission device and where a large pulley is not required.

Many modifications may be made in the invention without departing fromthe spirit of the same or the scope of the claims and the form shown isto be taken in an illustrative and not in a limiting sense.

What I claim as my invention and desire to secure by Letters Patentis 1. In a power transmission device the combination with a frictiondisk, of friction wheels engaging the friction disk on each sidethereof, longitudinal shafts, the friction wheels rigidly mounted uponthe longitudinal shafts, intermeshing gears rig- In a power transmissiondevice the com:

bination with a friction disk, of friction Wheels engaging the frictiondisk on each side thereof, longitudinal shafts, the friction Wheelsrigidly mounted upon the longitudinal shafts, inter-meshing gearsrigidly mounted on the longitudinal shafts, laterally swingable rockerbrackets, a power shaft rotatably mounted on the said rocker brackets, aflanged gear slidably keyed to the said power shaft, means forsimultaneously swinging the rocker brackets one way or the other forthrowing the flanged gear into engagement with one or other of theinter-meshing gears, andineans for locking the rocker arms in position.I

3-. In a power-transmission device, the combination with a'frictiondisk, of frictioi'i wheels engaging the friction disk on each sidethereof, longitudinal shafts, the friction wheels rigidly mounted uponthe longitudinal shafts, inter-meshing gears rigidly mounted on thelongitudinal shafts,

laterally s'wingable rocker brackets, a power shaft rotatably mountedon'the said rocker brackets, a flanged gear slidablykeyed to the saidpower shaft and meshing with one of theaforementioned gears, acontrolling lever having its upper end freely mounted on the powershaft, pivotally mounted pawls adapt-ed to engage the extremities oftherocker brackets for locking the flanged gear in position, a bell cranklever on the lower end of the aforesaid lever, pulley blocks, and cablespassing over the pulley blocks and connected to the lower end of thepawls for controlling the operation of the pawls.

4. In a power transmission device the.

the aforementioned gears, a depending lever freely mounted on said powershaft, and

means controlled by the lever for simul-' taneously moving theaforesaidlongitudinal' shafts longitudinally.

5. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk oneach sidethereof,'longitudinally slidable shafts, the said friction wheelsrigidly mounted on said shafts, inter-meshing gears rigidly secured tothe longitudinal shafts, a longitudinal power shaft, a gear slidablykeyed to said power shaft and meshing with one of the aforementionedgears, a depending lever freely mounted on said power shaft, a yoke,supporting brackets for the friction Wheels having bearing portionssurrounding the longitudinal shafts and connected to said yoke, a linkpivotally connected at one end to said yoke andpivotally connected atthe other end to the lever intermediately of its length;

6. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinally slidable shafts, the said friction wheels rigidly mountedonsaid shafts,-inter-meshing gears rigidly secured to the longitudinalshafts, a longitudinal power shaft, a gear slidably keyed to said powershaft and meshing with one of the aforementioned gears, a dependinglever freely mounted on said power shaft, a yoke, supporting bracketsfor the friction wheels having bearing portions surrounding thelongitudinal shafts and connected to said yoke, ,a link pivotallyconnected at one end to said yoke and pivotally connected at the otherend to the lever intermediately of its length, and means for nor mallylooking thelever in position.

7., In power transmission device the combination with a friction disk,of friction wheels engagingthe friction disk on each sidethereof,longitudinally slidable shafts, the said friction wheels rigidlymounted on said shafts,inter-meshinggears rigidly secured to thelongitudinal shafts, a longitudinal power shaft, a gearslidably keyed tosaid power shaft andmeshing with one of the aforementioned gears, adepending lever freely mounted on said power shaft, a yoke,

supportingbrackets for thefriction wheels. having bearing portionssurrounding the longitudinal shafts and connected to said yoke, a linkpivotally connected at one end to saidyoke and pivotally connected atthe other end to the lever intermediately of its length, and a toothedquadrant having a longitudinal slot therein, a spring pawl secured tothe lever intermediately ofits. length and adapted to engage the teethof the quadrant, said lever adapted to extend down through thelongitudinal slot in the quadrant.

8. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinally slidable shafts, the said friction wheels ribidly mountedon the said shafts, inter-meshing gears rigidly secured tothessaidshafts, rocker brackets, a power shaft, a double flanged gearslidably keyed to thepower shaft and meshing with one of the aforesaidgears, a lever freely connected to the power shaft for swinging therocker brackets simultaneously for throwing the aforesaid flanged gearinto engagement with the other of the aforesaid gears, and meansconnected to the lever for simultaneously moving the said shaftslongitudinally.

9; In a power transmission device the combination with a friction disk,of friction wheels engagingthe friction disk on each side thereof,longitudinally slidableshafts, the friction wheels rigidly mounted uponthe said shafts, intermeshinggears rigidly mounted on the said shafts,laterally swingable rocker brackets, a power shaft rotatably mounted onthe said rocker brackets, a double flanged gear slidably keyed to thesaid power shaft and meshing with one of the aforementioned gears, acontrolling lever having its upper end freely mounted on the powershaft, a yoke, supporting brackets for the friction wheels havingbearing portions surrounding the said shafts and connected to said yoke,and a link pivotally connected at one end to saidyoke and pivotallyconnected at the other, end to the lever intermediately of its lengthwhereby the longitudinal movement of, the longitudinally slidable shaftsis controlled.

- 10. In a power transmission device the combination with a frictiondisk, of friction wheels engaging the friction disk on eachside-thereof, longitudinally slidable shafts, the friction wheelsrigidly mounted upon the said shafts, intermeshing gears rigidly mountedon the said shafts, laterally swingable rocker brackets, a power shaftrotatably mounted on the said rocker brackets, a double flanged gearslidably keyed to the said power shaft and meshing with one of theaforementioned gears, a controlling lever having its upper end freelymounted on the power shaft, a yoke, supporting brackets for the frictionwheels having bearing portions surrounding the said shafts and connectedto said yoke, a link pivotally connected at one end to said yoke andpivotally connected at the other-end to the lever intermediately of itslength whereby the longitudinal movement of the longitu-- dinallyslidable shaftsis controlled, means for simultaneously locking therocker brackets in the required position, and means for locking thecontrolling lever in the required position. I

11. In a power transmission device the combination with a' frictiondisk, of friction wheels engaging the friction disk on each sidethereof, longitudinal shafts, the friction wheels'rigidly mounted uponthe longitudinal shafts, bearings for the longitudinal shafts, thebearings adjacent to the friction disk being laterally adjustable andthe bearings remote from the friction disk pivoted at their innerextremities and having arcshaped slots in their outer ends forpermitting the bearings to swing about their pivot points, and meansconnected to the bearings adjacent to the friction disk for spreadingthe longitudinal shafts for throwing the friction wheels out ofengagement with the friction disk.

12. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinal shafts, the friction wheels rigidly mounted upon thelongitudinal shafts, bearings for the longitudinal shafts, the bearingsadjacent to the friction disk being laterally adjustable and thebearings remote from the friction disk pivoted at their innerextremities and having arcshaped slots in their outer ends forpermitting the bearings to swing about their pivot points, a suitablymounted horizontally disposed disk, a lever connected to said disk, andarms connected at their outer ends to the inner ends of the bearingsadjacent to the friction disk and pivotally connected at their innerends to the disk.

13. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinal shafts, the friction wheels rigidly mounted on thelongitudinal shafts, a U-shaped yoke, supporting brackets for thefriction wheelshaving bearing portions surrounding the longitudinalshafts and connected to the U-shaped yoke, a

I suitably mounted horizontally disposed disk,

a lever connected to said disk, arms connected at their outer ends tothe inner ends of the bearings adjacent to the friction disk andpivotally connected at their inner ends to the disk, and projections onthe upper sides of the arms adapted to engage the longitudinal portionsof the yoke.

1a. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinally slidable shafts, the friction wheels rigidly mounted uponthe longitudinal shafts, of a U-shaped yoke divided into two portions,the end of one portion having a slot therein, a bolt extending throughthe slot and through the other portion of the yoke, supporting bracketsfor the friction wheels, having bearing portions surrounding thelongitudinal shafts and connected to the extremities of the U- shapedyoke, a controlling lever for controlling the longitudinal movement ofthe longitudinally slidable shafts, and a link pivotally connected atone end to the lever intermediately of its length, said bolt extendingthrough the other end of the link and pivotally connecting the same tothe yoke.

15. In a power transmission device the combination with a friction disk,of friction wheels engaging the friction disk on each side thereof,longitudinally slidable shafts, the friction wheels rigidly mounted uponthe longitudinal shafts, of a U-shaped yoke, supporting brackets for thefriction wheels having bearing portions surrounding the longitudinalshafts and connected to the extremities of the U-shaped yoke, acontrolling lever fulcrumed at its top, a link pivotally connected atone end to the U-shaped yoke and at the other end to the leverintermediately of its length for controlling the longitudinal movementof the longitudinally slidable shafts.

In testimony whereof I have signed at the city of Hamilton, in thecounty of Went- Worth, in the Province of Ontario, Canada, this 26th dayof November 1913.

JOHN WILSON COCKBURN.

Witnesses:

D. M. FETHERSTONHAUGH, E. M. NEAMS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

